Hot! A bit more feminine than I usually imagine Regulus (or any Black, for that matter), but no less gorgeous for that. It has been said before, but the black and white gives it a power that I think would be lost in color. The swirls are perhaps excessively contrasting, but they certainly do not detract from the piece, and I think if you removed them without adding another decorative element, the overall piece would seem slightly incomplete. You balanced the whole very well, IMO.